[计算机软件及应用]JDBC连接.docVIP

import java.awt.Color; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JOptionPane; import javax.swing.JPanel; import javax.swing.JPasswordField; import javax.swing.JTextField; public class denglu extends JFrame implements ActionListener{ private JPanel p; private JLabel name,pwd; private JTextField txtName; private JPasswordField txtPwd; private JButton b1,b2; public denglu(){ super(登录界面); p=new JPanel(); p.setLayout(null); p.setBackground(Color.red); name=new JLabel(用户名); name.setBounds(30,30,60,25); txtName=new JTextField(20); txtName.setBounds(95,30,120,25); p.add(name); p.add(txtName); pwd=new JLabel(密码); pwd.setBounds(30,60,60,25); txtPwd=new JPasswordField(20); txtPwd.setEchoChar(*); txtPwd.setBounds(95,60,120,25); p.add(pwd); p.add(txtPwd); b1=new JButton(确定); b1.setBounds(45,90,60,25); b1.addActionListener( this); b2=new JButton(取消); b2.setBounds(105,90,60,25); b2.addActionListener(this); p.add(b1); p.add(b2); this.add(p); this.setSize(250,170); this.setLocation(300, 300); this.setResizable(false); this.setDefaultCloseOperation (EXIT_ON_CLOSE); this.setVisible(true); } public static void main(String[] args) { // TODO Auto-generated method stub new denglu(); } @Override public void actionPerformed(ActionEvent e) { // TODO Auto-generated method stub Object s=e.getSource(); if(s==b1){ b1Click(); } if(s==b2){ b2Click(); } } private void b1Click(){ String username=txtName.getText (); String userped=new String (txtPwd.getPassword()); if(username.equals(孙茂玮) userped.equals(1234)){ new MenuDemo(); //JOptionPane.showMessageDialog(b1,密码或者用户 名错误,提示,JOptionPane.WARNING_MESSAGE); } else JOptionPane.showMessageDialog(b1,密码或者用户名 错误,提示,JOptionPane.WARNING_MESSAGE); } private void b2Click(){ txtNam